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Session Report

Summary:
Test run at: 2020-04-24 00:19:10 GMT
Client Prefix (v4): 72.19.159.x/24
Client AS (v4): 39939 (RISE-CO-AS39939)
IPv4 Probes: 75
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 blocked
Routable received
Largest spoofable neighbor prefix length /9
Spoof status key
receivedSpoofed packet was received.Pattern of tests from this IP block indicates a switch from allowing spoofing to blocking it.
rewrittenSpoofed packet was received, but the source address was changed en route.
blockedSpoofed packet was not received, but unspoofed packet was.
unknownNeither spoofed nor unspoofed packet was received.

Warnings:

IPv4 AS Route:
This test run probed the following paths in order to infer your ability to send different spoofed source packets. Each node in the graph corresponds to an autonomous system, i.e. different Internet service providers. NOTE: This graph does NOT show if an AS blocks spoofed packets, only the path taken by received spoofed packets. The IP Path Details are available for this run. If non-spoofed packets weren't received at a destination, the traceroute to that destination is not included in this graph and may even cause a totally empty graph.

  

  

IPv4 Adjacent Netblock Testing:

Your host (72.19.159.x/24) can spoof 8388607 neighboring addresses (within your /9 prefix)


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
72.19.159.x/24/3139939yes
72.19.159.x/24/3039939yes
72.19.159.x/24/2939939yes
72.19.159.x/24/2839939yes
72.19.159.x/24/2739939yes
72.19.159.x/24/2639939yes
72.19.159.x/24/2539939yes
72.19.159.x/24/2439939yes
72.19.158.x/24/2339939yes
72.19.157.x/24/2239939yes
72.19.155.x/24/2139939yes
72.19.151.x/24/2039939yes
72.19.143.x/24/1939939yes
72.19.191.x/24/1839939yes
72.19.223.x/24/1717358yes
72.19.31.x/24/16395494yes
72.18.159.x/24/1530475yes
72.17.159.x/24/147029yes
72.23.159.x/24/1327364yes
72.27.159.x/24/1230689yes
72.3.159.x/24/1133070yes
72.51.159.x/24/1010796yes
72.83.159.x/24/9701yes
72.147.159.x/24/8UNROUTEDnatblock

Meaning of status in Received column:

yesPackets spoofed from adjacent netblock were received
yesPackets spoofed from adjacent netblock were received (but that netblock is within the source AS)
natblockSpoofed probe packets appear to be blocked by your local NAT or firewall rather than being rewritten with a public source address.

IPv4 Outbound Filtering Depth:

The tracefilter test found your host able to spoof routable, non-adjacent source addresses through the first 10 IP hop(s).
Summary:
The results from all tests are aggregated to produce a summary "State of IP Spoofing" report.
Feedback:
We welcome questions and feedback to the Spoofer Information Mailing List and invite users to join the Spoofer Users Mailing List for discussion and announcements.
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